Anchor escapement for clocks and the like



Jan. 31, 1933. H. JUNGHANS 1,895,666

ANCHOR ESCAPEMENT FOR CLOCKS AND THE LIKE Filed March 5, 1932 Fig.1

k .b t d e c I n I! J 'h'": h H?! a I I ne a ham, 19 3- UNITED STATES KELIUT J'UN'GHANS, OF I ERG, WUBTEIBEBG, GER-KANT ancnon ascarmmw'r roa cLocxs m m mica Appllcatlon fled larch 5, 1882, 83119.1 It. 596,997, and in Germany Kay 22, 1981.

My invention relates to an anchor esca ment for clocks andthe like provided with two escapement wheels mounted on the same spindle and having the same pitch of tooth 5 but oppositely directed lifting planes, and

with only one anchor pin engaging alternately with one or the other of said wheels. The essential feature of this escapement consists in that the two escapement wheels are provided so that they have limited rotation with respect to each 0t er and are coupled together by such means as a spiral spring so that the teeth of one wheel are opposite to the wlder p6 between the teeth of the other wheel. he anchor pin engaging alternately with one or the other escapement wheel causes the two escapementwheels to rotate with respect to each other alternately in one'or the other direction, so that the couplin spring is stretched or released respective y and that every tooth of one wheel joinsalternately one 7 or the other of the two adjacent teeth of the other wheel. The anchor in is therefore always guided by one lifting plane of one wheelto the joining locking plane of the other wheel; thusit is guided almost con tinuously and gently.

The rotation of the two escapement wheels with respect to each other is limited by one or the other of two springs attached to one. wheel striking alternately against-a pin cov'- ered with a sound dampen material provided on the other wheel.

of the escapement wheels is not absorbed by their teeth and the anchor pin but by the springs and the pin referred to.

Owing to this construction the ticking,

which in the known escapements having two 40 anchor pins and only one wheel is caused by the impact of the teeth of this wheelagalnst the anchor pins occurring on the recoil of the escapement wheel, isalmost entirely eliminated. Furthermore together with the sec- 4 0nd anchor pin also the requirement of the exact positioning of thetwo anchorpinswith respect to the anchor spindle is spared.

In the accompanying drawing which illustrates my invention and forms part of this specification, Figure 1 is a side elevation of guided gently as ar as'the tooth 3 of the X00 has the recoil the escapement partly in section, and Figure 2 is a corresponding plan. On the escapement wheel spindle a is fixedly mounted the usual externally toothed escapement wheel I) and is loosely mounted the larger internally toothed escapement wheel 0. Both the wheels have the same pitch of tooth, but their lifting planes are oppositely directed. The teeth of one wheel are opposite to the wider gaps between the teeth of the other wheel. Both the wheels are coupled by a spiral spring (1, of which the inner end is securedto the wheel 0 and the outer end to a pin e mounted on the wheel b. The upper part of this in is covered with rubber or any other soun dampening material 0 and engages with certain play between two spring hooks f and g secured to the wheel a. The anchor i, which is mounted on the spindle h, has only one arm and carries only one pin it, which in, while the anchor i is swinging, engages a ternately with one or the other of the wheels-b and c.

In the position shown in Figure 2 the anchor 71 is about to swing outwardly so that its pin is disengages from the wheel 6' and .engages with the wheel 0. Immediately this pin slips off from the radial locking plane of the tooth 1 of the wheel I), the wheels 6 and c commence to rotate in the direction of the arrow, the pin is being driven by the lift ing plane of the'tooth 1 and gent y guided as far as the tooth 2 of the wheel 0 joining the tooth 1. When the pin It comes to rest against the radial lockin plane of the tooth 2, the wheel 0 is stoppe while the wheel 6 continuesto'rotate, so that the tooth 2 moves away from the tooth 1 and joins the tooth 3, and that the sprin' d is stretched. This rotationof the wheels and c with respect to each other is stopped by the resilient hook f strikwheel 6 joining the tooth 2. When the pin ternally toothed, said wheels having the same is comes to rest against the radial locking pitch of tooth but oppositely directed lift-' plane of the tooth-.3, the wheel b-is stopped, ing planes, the teeth of one of said wheels while the wheel 0 continues to rotate, so that being opposite to the wider gaps between the the teeth 2 and 4 of this wheel again join teeth 0 the other wheel, means resiliently the teeth 1 and 3 of the wheel 6 respectively, coupling together said wheels, means limitand that the spring cl is released. This rotaing the rotation of said wheels with respect tion of the wheels I) and owith respect to each to each other, an oscillating anchor, and a other is stopped by the resilient hock g strikpin carried by said anchor and adapted to ing against the pin 6. Thereupon the full engage alternately with one or the other of cycle of operations is repeated. said wheels.

The oscillations of the anchor i are limited 4. In an anchor escapement for clocks and by .one or the other of two leaf springs Z the like, the combination of an escapement secured to the hub of the anchor striking wheel spindle, two escapement wheels mountagainst the frame, pillar m, before the pin is 'ed on said spindle, one fixedly and the other reaches the tooth gullet of the wheels I) and 0. loosely, one of said wheels being externally This limitation can be changed by bending toothed and the other being larger and'in- .pact is dampened.

the springs Z just asv that of the rotation of ternally toothed, said wheels having'the same the wheelsb and c with respect to each other pitch of tooth but oppositely directed liftcan be changed by bending the spring hocks ing planes, the teeth of one of said wheels 7 and g. The pin is is cut down to form a being opposite to the wider gaps between the flat face at n, so that when the teeth of the teeth of the other wheel, a spiral spring, the

Twhe'els b and 0 strike against the pin is the ends of said spring being secured to one or. latter can give in the direction towards the the other of said wheels respectively, resilanchor spindle h and thus the impact be lent parts provided on one of said wheels, a

comes more tl d. th noise f theimpin provided on the other of said wheels and engaging with certain play between said two resilient parts, an oscillating anchor, and a secure by Letters Patent is: second pin carried by said anchor and adapt- 1. In an anchor escapement for clocks and ed to engage alternately with one or the the like, the combination of an escapement other'of said wheels. wheel spindle, two escapement wheels mount- What I claim as my invention and desire to loosely, one of said wheels being externally wheel spindle, two escapement wheels mounttoothed and the other being larger and ined on said spindle, one fixedly and the other ternally toothed, said wheels having the same loosely, one of said wheels being externally pitch of tooth but oppositely directed lifttoothed and the other being larger and ining planes, the teeth of one of said wheels beternally toothed, said wheels having the same ing opposite to the wider gaps between the pitch of tooth but oppositely directed lifting teeth of the other wheel, means resiliently planes, the teeth of one of said wheels being coupling together said wheels, an oscillating opposite to the wider gaps between the teeth anchor, and a pin carried by said anchor and 0f the other Wheel, a spiral spring, the ends adapted to engage alternately with one or of said spring being secured 'to one or the the other of said wheels. other of said wheels respectively, two spring 2. In an anchor escapement for clocks and hooks provlded on one ofsaid wheels, a pin the like, the combination of an escapement provided on the other of said wheels, the wheel spindle, two escapement wheels mountend of sald pin being covered with sound ed on said spindle, one fixedly and the other dampenin material and engaging with cerloosely, one of said wheels being externally tam play etween said two spring hooks, an

;toothed.and the other being larger and inoscillating anchor, and a second pin Carried ternally toothed, said wheels having the same by aid nchor and adapted to engage alterpitch of tooth but oppositely directed lifting nately with one or the other. of Said wheels. planes, the teeth of one of said wheels being In testimony whereof I affix my signature. opposite to the wider gaps between the teeth HELMUT J UNGHANS.

of the other wheel, a spiral spring coupling together said wheels, an oscillatin anchor, and a pin carried by said anchor an adapted to engage alternately with one or the other of said wheels.

3. In an anchor escapement for clocks and the like, the combination of an escapement wheel spindle, two escapement wheels mounted on said spindle, onefixedly and the other loosely, one of said wheels being externally toothed and the other being larger and .in-

5; In an anchor escapement for clocks and ed on said spindle, one fixedly and the other the like, the combination of an escapement 

